how to se the transformed output...

this part of XSLT code code works under IE but doesn't seem to do what i 
want under Mozilla...

                  <img>
                   <xsl:attribute name="alt">foto di <xsl:value-of 
select="mittente/nome" />:<xsl:value-of select="mittente/cognome" />, alias 
<xsl:value-of select="mittente/nick" />, &lt;<xsl:value-of 
select="mittente/mail" />&gt;</xsl:attribute>
                   <xsl:attribute name="src">
                    <xsl:value-of select="mittente/@silouette" />
                   </xsl:attribute>
                  </img>

is there a way to see the processed output instead of the original input?
thank you very much
sandr8)

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